Upright-piano action



(No Model.)

I. FUSO. UPRIGHT PIANO ACTION.

No. 325,669. Patented Sept. 8, 1885.

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UNITED STATES PATENT OFFICE.

IGNAZIO FUSO, OF BOSTON, MASSACHUSETTS.

UPRlGHT-PIANO ACTION.

SPECIFICATION frming part of Letters Patent No. 325,669, dated September 8, 1885.

Application filed March 30, 1855. (No model.)

To all whom it may concern:

Be it known that l, IGNAZIO FUSO, of Boston, in the county of Suffolk, of the Commonwealth of Massachusetts, have invented a new and useful Improvement in Upright- Piano Actions; and I do hereby declare the same to be described in the following specification, and represented in the accompanying drawings, of which- Figure 1 is a side elevation, and Fig. 2 a front view, ot two piano-keys and their hammers-and their operative Ineehanism containing my invention, the nature of which is defined in the claim hereinafter presented. Fig. 3 is a horizontal section taken immediately below the bar for supporting the back catches of the hammers, such showing the jack-tails as arranged to extend between the elevator to which thejack is pivoted and the next adjacent elevator.

In t-he said drawings, A and A are two next adjacent keys,directly over each of which, and hinged to a stationary bar, a, of the actionframe B, is a lever -or jack-elevator, C. A push-bar, D, suspended from each of the said elevators, rests upon the key and serves,when thekey is struck, to force upward the elevator.

Fulcrumed to each elevator is a jack, E, which is a' :right-angular lever, whose upper arm, b, extends at its upper part into the notch c of the fulcrum-block d of the hammer F.

The back catches of the two hammers are Shown at G G, they being, as usual, hinged t0 a stationary bar, H, immediately below which, or extended from it, as represented, is a bar, I, which is also stationary. The lower arm or tail, e, of each back catch has screwed into and down through it a screw, f, having a button, g, to` rest upon the elevator, which is directly under such arm. Vhen the said elevator moves upward, it moves the back catch properly toward the hammer, in order for the hammer-stop h to fall upon the back catch on retreat of the hammer from the string.

Each jack E, instead of having its tail or lower arm in parallelism with the vertical sides of the elevator over which such arm extends, is arranged askew or obliquely, so as to project over the space between its elevator and the next adjacent elevator, and directly underneath an adjustable stop, K, which is a headed screw that screws upward into and through abar, I, and is nicked at its upper end to receive a screw-driver. The said headl ed screw has its shank midway between the tails or lower arms of the back catches.

On the jack being forced upward to move the hammer the tail of the jack will be carried against the head i of lthe stop K, and in consequence thereof the jack will be moved out of action upon the hammer, so as to allow such hammer to fall away from the string and be caught by the back catch.

By having the tail of cach jack arranged askew or obliquely, so as to extend over the space between its elevator and the next adjacent elevator, the adjustable stops of such tails can be arranged between the tails of the back catches, so as to enable access to be easily had to each of such stops for revolving it by a screw-driver.

Vhat, therefore, I claim as my invention or improvement in the upright-piano action is as follows-that is to say:

The combination ofthe adj uslablejackstop arranged between the tails of two next adjacent back catches and screwed upward into a stationary bar placed below such tails, with the jacktal projected obliquely over the space between the elevator of such jack and that of the next adjacent jack and underneath the said adjustable stop, all being substantially as set forth.

IGNAZIO FUSO.

Witnesses: j

R. H. EDDY, ERNEST B. PRATT. 

